drivers/net/wireless/b43/debugfs.c - kernel/msm-4.9 - Gitiles

 /*

   Broadcom B43 wireless driver

   debugfs driver debugging code

   Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
   Boston, MA 02110-1301, USA.

 */

 #include <linux/fs.h>
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include <linux/mutex.h>

 #include "b43.h"
 #include "main.h"
 #include "debugfs.h"
 #include "dma.h"
 #include "xmit.h"


 /* The root directory. */
 static struct dentry *rootdir;

 struct b43_debugfs_fops {
 	ssize_t (*read)(struct b43_wldev *dev, char *buf, size_t bufsize);
 	int (*write)(struct b43_wldev *dev, const char *buf, size_t count);
 	struct file_operations fops;
 	/* Offset of struct b43_dfs_file in struct b43_dfsentry */
 	size_t file_struct_offset;
 	/* Take wl->irq_lock before calling read/write? */
 	bool take_irqlock;
 };

 static inline
 struct b43_dfs_file * fops_to_dfs_file(struct b43_wldev *dev,
 				       const struct b43_debugfs_fops *dfops)
 {
 	void *p;

 	p = dev->dfsentry;
 	p += dfops->file_struct_offset;

 	return p;
 }


 #define fappend(fmt, x...)	\
 	do {							\
 		if (bufsize - count)				\
 			count += snprintf(buf + count,		\
 					  bufsize - count,	\
 					  fmt , ##x);		\
 		else						\
 			printk(KERN_ERR "b43: fappend overflow\n"); \
 	} while (0)


 /* wl->irq_lock is locked */
 static ssize_t tsf_read_file(struct b43_wldev *dev,
 			     char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	u64 tsf;

 	b43_tsf_read(dev, &tsf);
 	fappend("0x%08x%08x\n",
 		(unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
 		(unsigned int)(tsf & 0xFFFFFFFFULL));

 	return count;
 }

 /* wl->irq_lock is locked */
 static int tsf_write_file(struct b43_wldev *dev,
 			  const char *buf, size_t count)
 {
 	u64 tsf;

 	if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
 		return -EINVAL;
 	b43_tsf_write(dev, tsf);

 	return 0;
 }

 /* wl->irq_lock is locked */
 static ssize_t ucode_regs_read_file(struct b43_wldev *dev,
 				    char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	int i;

 	for (i = 0; i < 64; i++) {
 		fappend("r%d = 0x%04x\n", i,
 			b43_shm_read16(dev, B43_SHM_SCRATCH, i));
 	}

 	return count;
 }

 /* wl->irq_lock is locked */
 static ssize_t shm_read_file(struct b43_wldev *dev,
 			     char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	int i;
 	u16 tmp;
 	__le16 *le16buf = (__le16 *)buf;

 	for (i = 0; i < 0x1000; i++) {
 		if (bufsize < sizeof(tmp))
 			break;
 		tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
 		le16buf[i] = cpu_to_le16(tmp);
 		count += sizeof(tmp);
 		bufsize -= sizeof(tmp);
 	}

 	return count;
 }

 static ssize_t txstat_read_file(struct b43_wldev *dev,
 				char *buf, size_t bufsize)
 {
 	struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
 	ssize_t count = 0;
 	unsigned long flags;
 	int i, idx;
 	struct b43_txstatus *stat;

 	spin_lock_irqsave(&log->lock, flags);
 	if (log->end < 0) {
 		fappend("Nothing transmitted, yet\n");
 		goto out_unlock;
 	}
 	fappend("b43 TX status reports:\n\n"
 		"index | cookie | seq | phy_stat | frame_count | "
 		"rts_count | supp_reason | pm_indicated | "
 		"intermediate | for_ampdu | acked\n" "---\n");
 	i = log->end + 1;
 	idx = 0;
 	while (1) {
 		if (i == B43_NR_LOGGED_TXSTATUS)
 			i = 0;
 		stat = &(log->log[i]);
 		if (stat->cookie) {
 			fappend("%03d | "
 				"0x%04X | 0x%04X | 0x%02X | "
 				"0x%X | 0x%X | "
 				"%u | %u | "
 				"%u | %u | %u\n",
 				idx,
 				stat->cookie, stat->seq, stat->phy_stat,
 				stat->frame_count, stat->rts_count,
 				stat->supp_reason, stat->pm_indicated,
 				stat->intermediate, stat->for_ampdu,
 				stat->acked);
 			idx++;
 		}
 		if (i == log->end)
 			break;
 		i++;
 	}
 out_unlock:
 	spin_unlock_irqrestore(&log->lock, flags);

 	return count;
 }

 static ssize_t txpower_g_read_file(struct b43_wldev *dev,
 				   char *buf, size_t bufsize)
 {
 	ssize_t count = 0;

 	if (dev->phy.type != B43_PHYTYPE_G) {
 		fappend("Device is not a G-PHY\n");
 		goto out;
 	}
 	fappend("Control:               %s\n", dev->phy.manual_txpower_control ?
 		"MANUAL" : "AUTOMATIC");
 	fappend("Baseband attenuation:  %u\n", dev->phy.bbatt.att);
 	fappend("Radio attenuation:     %u\n", dev->phy.rfatt.att);
 	fappend("TX Mixer Gain:         %s\n",
 		(dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
 	fappend("PA Gain 2dB:           %s\n",
 		(dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
 	fappend("PA Gain 3dB:           %s\n",
 		(dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
 	fappend("\n\n");
 	fappend("You can write to this file:\n");
 	fappend("Writing \"auto\" enables automatic txpower control.\n");
 	fappend
 	    ("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
 	     "enables manual txpower control.\n");
 	fappend("Example: 5 4 0 0 1\n");
 	fappend("Enables manual control with Baseband attenuation 5, "
 		"Radio attenuation 4, No TX Mixer Gain, "
 		"No PA Gain 2dB, With PA Gain 3dB.\n");
 out:
 	return count;
 }

 static int txpower_g_write_file(struct b43_wldev *dev,
 				const char *buf, size_t count)
 {
 	if (dev->phy.type != B43_PHYTYPE_G)
 		return -ENODEV;
 	if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
 		/* Automatic control */
 		dev->phy.manual_txpower_control = 0;
 		b43_phy_xmitpower(dev);
 	} else {
 		int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
 		/* Manual control */
 		if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
 			   &txmix, &pa2db, &pa3db) != 5)
 			return -EINVAL;
 		b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
 		dev->phy.manual_txpower_control = 1;
 		dev->phy.bbatt.att = bbatt;
 		dev->phy.rfatt.att = rfatt;
 		dev->phy.tx_control = 0;
 		if (txmix)
 			dev->phy.tx_control |= B43_TXCTL_TXMIX;
 		if (pa2db)
 			dev->phy.tx_control |= B43_TXCTL_PA2DB;
 		if (pa3db)
 			dev->phy.tx_control |= B43_TXCTL_PA3DB;
 		b43_phy_lock(dev);
 		b43_radio_lock(dev);
 		b43_set_txpower_g(dev, &dev->phy.bbatt,
 				  &dev->phy.rfatt, dev->phy.tx_control);
 		b43_radio_unlock(dev);
 		b43_phy_unlock(dev);
 	}

 	return 0;
 }

 /* wl->irq_lock is locked */
 static int restart_write_file(struct b43_wldev *dev,
 			      const char *buf, size_t count)
 {
 	int err = 0;

 	if (count > 0 && buf[0] == '1') {
 		b43_controller_restart(dev, "manually restarted");
 	} else
 		err = -EINVAL;

 	return err;
 }

 static ssize_t append_lo_table(ssize_t count, char *buf, const size_t bufsize,
 			       struct b43_loctl table[B43_NR_BB][B43_NR_RF])
 {
 	unsigned int i, j;
 	struct b43_loctl *ctl;

 	for (i = 0; i < B43_NR_BB; i++) {
 		for (j = 0; j < B43_NR_RF; j++) {
 			ctl = &(table[i][j]);
 			fappend("(bbatt %2u, rfatt %2u)  ->  "
 				"(I %+3d, Q %+3d, Used: %d, Calibrated: %d)\n",
 				i, j, ctl->i, ctl->q,
 				ctl->used,
 				b43_loctl_is_calibrated(ctl));
 		}
 	}

 	return count;
 }

 static ssize_t loctls_read_file(struct b43_wldev *dev,
 				char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	struct b43_txpower_lo_control *lo;
 	int i, err = 0;

 	if (dev->phy.type != B43_PHYTYPE_G) {
 		fappend("Device is not a G-PHY\n");
 		err = -ENODEV;
 		goto out;
 	}
 	lo = dev->phy.lo_control;
 	fappend("-- Local Oscillator calibration data --\n\n");
 	fappend("Measured: %d,  Rebuild: %d,  HW-power-control: %d\n",
 		lo->lo_measured,
 		lo->rebuild,
 		dev->phy.hardware_power_control);
 	fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X\n",
 		lo->tx_bias, lo->tx_magn);
 	fappend("Power Vector: 0x%08X%08X\n",
 		(unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
 		(unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL));
 	fappend("\nControl table WITH PADMIX:\n");
 	count = append_lo_table(count, buf, bufsize, lo->with_padmix);
 	fappend("\nControl table WITHOUT PADMIX:\n");
 	count = append_lo_table(count, buf, bufsize, lo->no_padmix);
 	fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
 	for (i = 0; i < lo->rfatt_list.len; i++) {
 		fappend("%u(%d), ",
 			lo->rfatt_list.list[i].att,
 			lo->rfatt_list.list[i].with_padmix);
 	}
 	fappend("\n");
 	fappend("\nUsed Baseband attenuation values:\n");
 	for (i = 0; i < lo->bbatt_list.len; i++) {
 		fappend("%u, ",
 			lo->bbatt_list.list[i].att);
 	}
 	fappend("\n");

 out:
 	return err ? err : count;
 }

 #undef fappend

 static int b43_debugfs_open(struct inode *inode, struct file *file)
 {
 	file->private_data = inode->i_private;
 	return 0;
 }

 static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
 				size_t count, loff_t *ppos)
 {
 	struct b43_wldev *dev;
 	struct b43_debugfs_fops *dfops;
 	struct b43_dfs_file *dfile;
 	ssize_t uninitialized_var(ret);
 	char *buf;
 	const size_t bufsize = 1024 * 128;
 	const size_t buforder = get_order(bufsize);
 	int err = 0;

 	if (!count)
 		return 0;
 	dev = file->private_data;
 	if (!dev)
 		return -ENODEV;

 	mutex_lock(&dev->wl->mutex);
 	if (b43_status(dev) < B43_STAT_INITIALIZED) {
 		err = -ENODEV;
 		goto out_unlock;
 	}

 	dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 	if (!dfops->read) {
 		err = -ENOSYS;
 		goto out_unlock;
 	}
 	dfile = fops_to_dfs_file(dev, dfops);

 	if (!dfile->buffer) {
 		buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
 		if (!buf) {
 			err = -ENOMEM;
 			goto out_unlock;
 		}
 		/* Sparse warns about the following memset, because it has a big
 		 * size value. That warning is bogus, so I will ignore it. --mb */
 		memset(buf, 0, bufsize);
 		if (dfops->take_irqlock) {
 			spin_lock_irq(&dev->wl->irq_lock);
 			ret = dfops->read(dev, buf, bufsize);
 			spin_unlock_irq(&dev->wl->irq_lock);
 		} else
 			ret = dfops->read(dev, buf, bufsize);
 		if (ret <= 0) {
 			free_pages((unsigned long)buf, buforder);
 			err = ret;
 			goto out_unlock;
 		}
 		dfile->data_len = ret;
 		dfile->buffer = buf;
 	}

 	ret = simple_read_from_buffer(userbuf, count, ppos,
 				      dfile->buffer,
 				      dfile->data_len);
 	if (*ppos >= dfile->data_len) {
 		free_pages((unsigned long)dfile->buffer, buforder);
 		dfile->buffer = NULL;
 		dfile->data_len = 0;
 	}
 out_unlock:
 	mutex_unlock(&dev->wl->mutex);

 	return err ? err : ret;
 }

 static ssize_t b43_debugfs_write(struct file *file,
 				 const char __user *userbuf,
 				 size_t count, loff_t *ppos)
 {
 	struct b43_wldev *dev;
 	struct b43_debugfs_fops *dfops;
 	char *buf;
 	int err = 0;

 	if (!count)
 		return 0;
 	if (count > PAGE_SIZE)
 		return -E2BIG;
 	dev = file->private_data;
 	if (!dev)
 		return -ENODEV;

 	mutex_lock(&dev->wl->mutex);
 	if (b43_status(dev) < B43_STAT_INITIALIZED) {
 		err = -ENODEV;
 		goto out_unlock;
 	}

 	dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 	if (!dfops->write) {
 		err = -ENOSYS;
 		goto out_unlock;
 	}

 	buf = (char *)get_zeroed_page(GFP_KERNEL);
 	if (!buf) {
 		err = -ENOMEM;
 		goto out_unlock;
 	}
 	if (copy_from_user(buf, userbuf, count)) {
 		err = -EFAULT;
 		goto out_freepage;
 	}
 	if (dfops->take_irqlock) {
 		spin_lock_irq(&dev->wl->irq_lock);
 		err = dfops->write(dev, buf, count);
 		spin_unlock_irq(&dev->wl->irq_lock);
 	} else
 		err = dfops->write(dev, buf, count);
 	if (err)
 		goto out_freepage;

 out_freepage:
 	free_page((unsigned long)buf);
 out_unlock:
 	mutex_unlock(&dev->wl->mutex);

 	return err ? err : count;
 }


 #define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock)	\
 	static struct b43_debugfs_fops fops_##name = {		\
 		.read	= _read,				\
 		.write	= _write,				\
 		.fops	= {					\
 			.open	= b43_debugfs_open,		\
 			.read	= b43_debugfs_read,		\
 			.write	= b43_debugfs_write,		\
 		},						\
 		.file_struct_offset = offsetof(struct b43_dfsentry, \
 					       file_##name),	\
 		.take_irqlock	= _take_irqlock,		\
 	}

 B43_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
 B43_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
 B43_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
 B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
 B43_DEBUGFS_FOPS(txpower_g, txpower_g_read_file, txpower_g_write_file, 0);
 B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
 B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);


 int b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 {
 	return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
 }

 static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e = dev->dfsentry;
 	int i;

 	for (i = 0; i < __B43_NR_DYNDBG; i++)
 		debugfs_remove(e->dyn_debug_dentries[i]);
 }

 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e = dev->dfsentry;
 	struct dentry *d;

 #define add_dyn_dbg(name, id, initstate) do {		\
 	e->dyn_debug[id] = (initstate);			\
 	d = debugfs_create_bool(name, 0600, e->subdir,	\
 				&(e->dyn_debug[id]));	\
 	if (!IS_ERR(d))					\
 		e->dyn_debug_dentries[id] = d;		\
 				} while (0)

 	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
 	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
 	add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
 	add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
 	add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);

 #undef add_dyn_dbg
 }

 void b43_debugfs_add_device(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e;
 	struct b43_txstatus_log *log;
 	char devdir[16];

 	B43_WARN_ON(!dev);
 	e = kzalloc(sizeof(*e), GFP_KERNEL);
 	if (!e) {
 		b43err(dev->wl, "debugfs: add device OOM\n");
 		return;
 	}
 	e->dev = dev;
 	log = &e->txstatlog;
 	log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
 			   sizeof(struct b43_txstatus), GFP_KERNEL);
 	if (!log->log) {
 		b43err(dev->wl, "debugfs: add device txstatus OOM\n");
 		kfree(e);
 		return;
 	}
 	log->end = -1;
 	spin_lock_init(&log->lock);

 	dev->dfsentry = e;

 	snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 	e->subdir = debugfs_create_dir(devdir, rootdir);
 	if (!e->subdir || IS_ERR(e->subdir)) {
 		if (e->subdir == ERR_PTR(-ENODEV)) {
 			b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
 			       "enabled in kernel config\n");
 		} else {
 			b43err(dev->wl, "debugfs: cannot create %s directory\n",
 			       devdir);
 		}
 		dev->dfsentry = NULL;
 		kfree(log->log);
 		kfree(e);
 		return;
 	}

 #define ADD_FILE(name, mode)	\
 	do {							\
 		struct dentry *d;				\
 		d = debugfs_create_file(__stringify(name),	\
 					mode, e->subdir, dev,	\
 					&fops_##name.fops);	\
 		e->file_##name.dentry = NULL;			\
 		if (!IS_ERR(d))					\
 			e->file_##name.dentry = d;		\
 	} while (0)


 	ADD_FILE(tsf, 0600);
 	ADD_FILE(ucode_regs, 0400);
 	ADD_FILE(shm, 0400);
 	ADD_FILE(txstat, 0400);
 	ADD_FILE(txpower_g, 0600);
 	ADD_FILE(restart, 0200);
 	ADD_FILE(loctls, 0400);

 #undef ADD_FILE

 	b43_add_dynamic_debug(dev);
 }

 void b43_debugfs_remove_device(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e;

 	if (!dev)
 		return;
 	e = dev->dfsentry;
 	if (!e)
 		return;
 	b43_remove_dynamic_debug(dev);

 	debugfs_remove(e->file_tsf.dentry);
 	debugfs_remove(e->file_ucode_regs.dentry);
 	debugfs_remove(e->file_shm.dentry);
 	debugfs_remove(e->file_txstat.dentry);
 	debugfs_remove(e->file_txpower_g.dentry);
 	debugfs_remove(e->file_restart.dentry);
 	debugfs_remove(e->file_loctls.dentry);

 	debugfs_remove(e->subdir);
 	kfree(e->txstatlog.log);
 	kfree(e);
 }

 void b43_debugfs_log_txstat(struct b43_wldev *dev,
 			    const struct b43_txstatus *status)
 {
 	struct b43_dfsentry *e = dev->dfsentry;
 	struct b43_txstatus_log *log;
 	struct b43_txstatus *cur;
 	int i;

 	if (!e)
 		return;
 	log = &e->txstatlog;
 	B43_WARN_ON(!irqs_disabled());
 	spin_lock(&log->lock);
 	i = log->end + 1;
 	if (i == B43_NR_LOGGED_TXSTATUS)
 		i = 0;
 	log->end = i;
 	cur = &(log->log[i]);
 	memcpy(cur, status, sizeof(*cur));
 	spin_unlock(&log->lock);
 }

 void b43_debugfs_init(void)
 {
 	rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 	if (IS_ERR(rootdir))
 		rootdir = NULL;
 }

 void b43_debugfs_exit(void)
 {
 	debugfs_remove(rootdir);
 }
	/*

	Broadcom B43 wireless driver

	debugfs driver debugging code

	Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; see the file COPYING. If not, write to
	the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
	Boston, MA 02110-1301, USA.

	*/

	#include <linux/fs.h>
	#include <linux/debugfs.h>
	#include <linux/slab.h>
	#include <linux/netdevice.h>
	#include <linux/pci.h>
	#include <linux/mutex.h>

	#include "b43.h"
	#include "main.h"
	#include "debugfs.h"
	#include "dma.h"
	#include "xmit.h"


	/* The root directory. */
	static struct dentry *rootdir;

	struct b43_debugfs_fops {
	ssize_t (read)(struct b43_wldev dev, char *buf, size_t bufsize);
	int (write)(struct b43_wldev dev, const char *buf, size_t count);
	struct file_operations fops;
	/* Offset of struct b43_dfs_file in struct b43_dfsentry */
	size_t file_struct_offset;
	/* Take wl->irq_lock before calling read/write? */
	bool take_irqlock;
	};

	static inline
	struct b43_dfs_file * fops_to_dfs_file(struct b43_wldev *dev,
	const struct b43_debugfs_fops *dfops)
	{
	void *p;

	p = dev->dfsentry;
	p += dfops->file_struct_offset;

	return p;
	}


	#define fappend(fmt, x...) \
	do { \
	if (bufsize - count) \
	count += snprintf(buf + count, \
	bufsize - count, \
	fmt , ##x); \
	else \
	printk(KERN_ERR "b43: fappend overflow\n"); \
	} while (0)


	/* wl->irq_lock is locked */
	static ssize_t tsf_read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	u64 tsf;

	b43_tsf_read(dev, &tsf);
	fappend("0x%08x%08x\n",
	(unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
	(unsigned int)(tsf & 0xFFFFFFFFULL));

	return count;
	}

	/* wl->irq_lock is locked */
	static int tsf_write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	u64 tsf;

	if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
	return -EINVAL;
	b43_tsf_write(dev, tsf);

	return 0;
	}

	/* wl->irq_lock is locked */
	static ssize_t ucode_regs_read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	int i;

	for (i = 0; i < 64; i++) {
	fappend("r%d = 0x%04x\n", i,
	b43_shm_read16(dev, B43_SHM_SCRATCH, i));
	}

	return count;
	}

	/* wl->irq_lock is locked */
	static ssize_t shm_read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	int i;
	u16 tmp;
	__le16 le16buf = (__le16 )buf;

	for (i = 0; i < 0x1000; i++) {
	if (bufsize < sizeof(tmp))
	break;
	tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
	le16buf[i] = cpu_to_le16(tmp);
	count += sizeof(tmp);
	bufsize -= sizeof(tmp);
	}

	return count;
	}

	static ssize_t txstat_read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
	ssize_t count = 0;
	unsigned long flags;
	int i, idx;
	struct b43_txstatus *stat;

	spin_lock_irqsave(&log->lock, flags);
	if (log->end < 0) {
	fappend("Nothing transmitted, yet\n");
	goto out_unlock;
	}
	fappend("b43 TX status reports:\n\n"
	"index \| cookie \| seq \| phy_stat \| frame_count \| "
	"rts_count \| supp_reason \| pm_indicated \| "
	"intermediate \| for_ampdu \| acked\n" "---\n");
	i = log->end + 1;
	idx = 0;
	while (1) {
	if (i == B43_NR_LOGGED_TXSTATUS)
	i = 0;
	stat = &(log->log[i]);
	if (stat->cookie) {
	fappend("%03d \| "
	"0x%04X \| 0x%04X \| 0x%02X \| "
	"0x%X \| 0x%X \| "
	"%u \| %u \| "
	"%u \| %u \| %u\n",
	idx,
	stat->cookie, stat->seq, stat->phy_stat,
	stat->frame_count, stat->rts_count,
	stat->supp_reason, stat->pm_indicated,
	stat->intermediate, stat->for_ampdu,
	stat->acked);
	idx++;
	}
	if (i == log->end)
	break;
	i++;
	}
	out_unlock:
	spin_unlock_irqrestore(&log->lock, flags);

	return count;
	}

	static ssize_t txpower_g_read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;

	if (dev->phy.type != B43_PHYTYPE_G) {
	fappend("Device is not a G-PHY\n");
	goto out;
	}
	fappend("Control: %s\n", dev->phy.manual_txpower_control ?
	"MANUAL" : "AUTOMATIC");
	fappend("Baseband attenuation: %u\n", dev->phy.bbatt.att);
	fappend("Radio attenuation: %u\n", dev->phy.rfatt.att);
	fappend("TX Mixer Gain: %s\n",
	(dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
	fappend("PA Gain 2dB: %s\n",
	(dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
	fappend("PA Gain 3dB: %s\n",
	(dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
	fappend("\n\n");
	fappend("You can write to this file:\n");
	fappend("Writing \"auto\" enables automatic txpower control.\n");
	fappend
	("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
	"enables manual txpower control.\n");
	fappend("Example: 5 4 0 0 1\n");
	fappend("Enables manual control with Baseband attenuation 5, "
	"Radio attenuation 4, No TX Mixer Gain, "
	"No PA Gain 2dB, With PA Gain 3dB.\n");
	out:
	return count;
	}

	static int txpower_g_write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	if (dev->phy.type != B43_PHYTYPE_G)
	return -ENODEV;
	if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
	/* Automatic control */
	dev->phy.manual_txpower_control = 0;
	b43_phy_xmitpower(dev);
	} else {
	int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
	/* Manual control */
	if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
	&txmix, &pa2db, &pa3db) != 5)
	return -EINVAL;
	b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
	dev->phy.manual_txpower_control = 1;
	dev->phy.bbatt.att = bbatt;
	dev->phy.rfatt.att = rfatt;
	dev->phy.tx_control = 0;
	if (txmix)
	dev->phy.tx_control \|= B43_TXCTL_TXMIX;
	if (pa2db)
	dev->phy.tx_control \|= B43_TXCTL_PA2DB;
	if (pa3db)
	dev->phy.tx_control \|= B43_TXCTL_PA3DB;
	b43_phy_lock(dev);
	b43_radio_lock(dev);
	b43_set_txpower_g(dev, &dev->phy.bbatt,
	&dev->phy.rfatt, dev->phy.tx_control);
	b43_radio_unlock(dev);
	b43_phy_unlock(dev);
	}

	return 0;
	}

	/* wl->irq_lock is locked */
	static int restart_write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	int err = 0;

	if (count > 0 && buf[0] == '1') {
	b43_controller_restart(dev, "manually restarted");
	} else
	err = -EINVAL;

	return err;
	}

	static ssize_t append_lo_table(ssize_t count, char *buf, const size_t bufsize,
	struct b43_loctl table[B43_NR_BB][B43_NR_RF])
	{
	unsigned int i, j;
	struct b43_loctl *ctl;

	for (i = 0; i < B43_NR_BB; i++) {
	for (j = 0; j < B43_NR_RF; j++) {
	ctl = &(table[i][j]);
	fappend("(bbatt %2u, rfatt %2u) -> "
	"(I %+3d, Q %+3d, Used: %d, Calibrated: %d)\n",
	i, j, ctl->i, ctl->q,
	ctl->used,
	b43_loctl_is_calibrated(ctl));
	}
	}

	return count;
	}

	static ssize_t loctls_read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	struct b43_txpower_lo_control *lo;
	int i, err = 0;

	if (dev->phy.type != B43_PHYTYPE_G) {
	fappend("Device is not a G-PHY\n");
	err = -ENODEV;
	goto out;
	}
	lo = dev->phy.lo_control;
	fappend("-- Local Oscillator calibration data --\n\n");
	fappend("Measured: %d, Rebuild: %d, HW-power-control: %d\n",
	lo->lo_measured,
	lo->rebuild,
	dev->phy.hardware_power_control);
	fappend("TX Bias: 0x%02X, TX Magn: 0x%02X\n",
	lo->tx_bias, lo->tx_magn);
	fappend("Power Vector: 0x%08X%08X\n",
	(unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
	(unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL));
	fappend("\nControl table WITH PADMIX:\n");
	count = append_lo_table(count, buf, bufsize, lo->with_padmix);
	fappend("\nControl table WITHOUT PADMIX:\n");
	count = append_lo_table(count, buf, bufsize, lo->no_padmix);
	fappend("\nUsed RF attenuation values: Value(WithPadmix flag)\n");
	for (i = 0; i < lo->rfatt_list.len; i++) {
	fappend("%u(%d), ",
	lo->rfatt_list.list[i].att,
	lo->rfatt_list.list[i].with_padmix);
	}
	fappend("\n");
	fappend("\nUsed Baseband attenuation values:\n");
	for (i = 0; i < lo->bbatt_list.len; i++) {
	fappend("%u, ",
	lo->bbatt_list.list[i].att);
	}
	fappend("\n");

	out:
	return err ? err : count;
	}

	#undef fappend

	static int b43_debugfs_open(struct inode inode, struct file file)
	{
	file->private_data = inode->i_private;
	return 0;
	}

	static ssize_t b43_debugfs_read(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	struct b43_wldev *dev;
	struct b43_debugfs_fops *dfops;
	struct b43_dfs_file *dfile;
	ssize_t uninitialized_var(ret);
	char *buf;
	const size_t bufsize = 1024 * 128;
	const size_t buforder = get_order(bufsize);
	int err = 0;

	if (!count)
	return 0;
	dev = file->private_data;
	if (!dev)
	return -ENODEV;

	mutex_lock(&dev->wl->mutex);
	if (b43_status(dev) < B43_STAT_INITIALIZED) {
	err = -ENODEV;
	goto out_unlock;
	}

	dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
	if (!dfops->read) {
	err = -ENOSYS;
	goto out_unlock;
	}
	dfile = fops_to_dfs_file(dev, dfops);

	if (!dfile->buffer) {
	buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
	if (!buf) {
	err = -ENOMEM;
	goto out_unlock;
	}
	/* Sparse warns about the following memset, because it has a big
	* size value. That warning is bogus, so I will ignore it. --mb */
	memset(buf, 0, bufsize);
	if (dfops->take_irqlock) {
	spin_lock_irq(&dev->wl->irq_lock);
	ret = dfops->read(dev, buf, bufsize);
	spin_unlock_irq(&dev->wl->irq_lock);
	} else
	ret = dfops->read(dev, buf, bufsize);
	if (ret <= 0) {
	free_pages((unsigned long)buf, buforder);
	err = ret;
	goto out_unlock;
	}
	dfile->data_len = ret;
	dfile->buffer = buf;
	}

	ret = simple_read_from_buffer(userbuf, count, ppos,
	dfile->buffer,
	dfile->data_len);
	if (*ppos >= dfile->data_len) {
	free_pages((unsigned long)dfile->buffer, buforder);
	dfile->buffer = NULL;
	dfile->data_len = 0;
	}
	out_unlock:
	mutex_unlock(&dev->wl->mutex);

	return err ? err : ret;
	}

	static ssize_t b43_debugfs_write(struct file *file,
	const char __user *userbuf,
	size_t count, loff_t *ppos)
	{
	struct b43_wldev *dev;
	struct b43_debugfs_fops *dfops;
	char *buf;
	int err = 0;

	if (!count)
	return 0;
	if (count > PAGE_SIZE)
	return -E2BIG;
	dev = file->private_data;
	if (!dev)
	return -ENODEV;

	mutex_lock(&dev->wl->mutex);
	if (b43_status(dev) < B43_STAT_INITIALIZED) {
	err = -ENODEV;
	goto out_unlock;
	}

	dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
	if (!dfops->write) {
	err = -ENOSYS;
	goto out_unlock;
	}

	buf = (char *)get_zeroed_page(GFP_KERNEL);
	if (!buf) {
	err = -ENOMEM;
	goto out_unlock;
	}
	if (copy_from_user(buf, userbuf, count)) {
	err = -EFAULT;
	goto out_freepage;
	}
	if (dfops->take_irqlock) {
	spin_lock_irq(&dev->wl->irq_lock);
	err = dfops->write(dev, buf, count);
	spin_unlock_irq(&dev->wl->irq_lock);
	} else
	err = dfops->write(dev, buf, count);
	if (err)
	goto out_freepage;

	out_freepage:
	free_page((unsigned long)buf);
	out_unlock:
	mutex_unlock(&dev->wl->mutex);

	return err ? err : count;
	}


	#define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock) \
	static struct b43_debugfs_fops fops_##name = { \
	.read = _read, \
	.write = _write, \
	.fops = { \
	.open = b43_debugfs_open, \
	.read = b43_debugfs_read, \
	.write = b43_debugfs_write, \
	}, \
	.file_struct_offset = offsetof(struct b43_dfsentry, \
	file_##name), \
	.take_irqlock = _take_irqlock, \
	}

	B43_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
	B43_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
	B43_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
	B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
	B43_DEBUGFS_FOPS(txpower_g, txpower_g_read_file, txpower_g_write_file, 0);
	B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
	B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);


	int b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
	{
	return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
	}

	static void b43_remove_dynamic_debug(struct b43_wldev *dev)
	{
	struct b43_dfsentry *e = dev->dfsentry;
	int i;

	for (i = 0; i < __B43_NR_DYNDBG; i++)
	debugfs_remove(e->dyn_debug_dentries[i]);
	}

	static void b43_add_dynamic_debug(struct b43_wldev *dev)
	{
	struct b43_dfsentry *e = dev->dfsentry;
	struct dentry *d;

	#define add_dyn_dbg(name, id, initstate) do { \
	e->dyn_debug[id] = (initstate); \
	d = debugfs_create_bool(name, 0600, e->subdir, \
	&(e->dyn_debug[id])); \
	if (!IS_ERR(d)) \
	e->dyn_debug_dentries[id] = d; \
	} while (0)

	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
	add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
	add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
	add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);

	#undef add_dyn_dbg
	}

	void b43_debugfs_add_device(struct b43_wldev *dev)
	{
	struct b43_dfsentry *e;
	struct b43_txstatus_log *log;
	char devdir[16];

	B43_WARN_ON(!dev);
	e = kzalloc(sizeof(*e), GFP_KERNEL);
	if (!e) {
	b43err(dev->wl, "debugfs: add device OOM\n");
	return;
	}
	e->dev = dev;
	log = &e->txstatlog;
	log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
	sizeof(struct b43_txstatus), GFP_KERNEL);
	if (!log->log) {
	b43err(dev->wl, "debugfs: add device txstatus OOM\n");
	kfree(e);
	return;
	}
	log->end = -1;
	spin_lock_init(&log->lock);

	dev->dfsentry = e;

	snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
	e->subdir = debugfs_create_dir(devdir, rootdir);
	if (!e->subdir \|\| IS_ERR(e->subdir)) {
	if (e->subdir == ERR_PTR(-ENODEV)) {
	b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
	"enabled in kernel config\n");
	} else {
	b43err(dev->wl, "debugfs: cannot create %s directory\n",
	devdir);
	}
	dev->dfsentry = NULL;
	kfree(log->log);
	kfree(e);
	return;
	}

	#define ADD_FILE(name, mode) \
	do { \
	struct dentry *d; \
	d = debugfs_create_file(__stringify(name), \
	mode, e->subdir, dev, \
	&fops_##name.fops); \
	e->file_##name.dentry = NULL; \
	if (!IS_ERR(d)) \
	e->file_##name.dentry = d; \
	} while (0)


	ADD_FILE(tsf, 0600);
	ADD_FILE(ucode_regs, 0400);
	ADD_FILE(shm, 0400);
	ADD_FILE(txstat, 0400);
	ADD_FILE(txpower_g, 0600);
	ADD_FILE(restart, 0200);
	ADD_FILE(loctls, 0400);

	#undef ADD_FILE

	b43_add_dynamic_debug(dev);
	}

	void b43_debugfs_remove_device(struct b43_wldev *dev)
	{
	struct b43_dfsentry *e;

	if (!dev)
	return;
	e = dev->dfsentry;
	if (!e)
	return;
	b43_remove_dynamic_debug(dev);

	debugfs_remove(e->file_tsf.dentry);
	debugfs_remove(e->file_ucode_regs.dentry);
	debugfs_remove(e->file_shm.dentry);
	debugfs_remove(e->file_txstat.dentry);
	debugfs_remove(e->file_txpower_g.dentry);
	debugfs_remove(e->file_restart.dentry);
	debugfs_remove(e->file_loctls.dentry);

	debugfs_remove(e->subdir);
	kfree(e->txstatlog.log);
	kfree(e);
	}

	void b43_debugfs_log_txstat(struct b43_wldev *dev,
	const struct b43_txstatus *status)
	{
	struct b43_dfsentry *e = dev->dfsentry;
	struct b43_txstatus_log *log;
	struct b43_txstatus *cur;
	int i;

	if (!e)
	return;
	log = &e->txstatlog;
	B43_WARN_ON(!irqs_disabled());
	spin_lock(&log->lock);
	i = log->end + 1;
	if (i == B43_NR_LOGGED_TXSTATUS)
	i = 0;
	log->end = i;
	cur = &(log->log[i]);
	memcpy(cur, status, sizeof(*cur));
	spin_unlock(&log->lock);
	}

	void b43_debugfs_init(void)
	{
	rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
	if (IS_ERR(rootdir))
	rootdir = NULL;
	}

	void b43_debugfs_exit(void)
	{
	debugfs_remove(rootdir);
	}